What is double-spending in crypto and how to solve it Double spending is one of the biggest risks that pose a huge threat to cryptocurrency. People see it as a problem and a technical flaw that exposes all digital assets, making it prone to many possible intrusions, hacks and even more exploits in the long run. Crypto double spending has been rampant in the industry for a while now, and many malicious users have taken advantage of the system’s flaw to get more out of the money they tried to get.